Attestation Verification

DSSE 7-Stage Canon Verifier

Paste a Canon Attestation JSON and walk it through all 7 verification stages. See exactly where trust is established — from witness hash to custody chain. Runs entirely in your browser via WebCrypto.

Canon Attestation Verifier

7-stage verification pipeline — paste a Canon attestation JSON to inspect each step

Attestation JSON

Public Key — PEM, optional (required for stage 7 signature check)

Stage 7 will be skipped without a public key

Stage 4 note: chain_hash = SHA-256(RFC 8785 canonical JSON with seal → null). The sample attestation uses a placeholder chain_hash — stage 4 will fail intentionally, demonstrating what a tampered or incomplete attestation looks like.